I was thinking how I would go about building a remote control lock with an Arduino (or better yet a Raspberry Pi when I get one) and thought I'd check to see if any were available for sale. Schlage has something at a ridiculously high price with a monthly fee of $9-$13 or so. Insanity!
So I'm back to thinking about building one myself. I'm thinking the Pi would have its own web server and wifi interface to connect to my router. I'm pretty sure I can mange the software side of things but need some direction on the hardware.
How would you do it, if you were going to build one? What other hardware would I need to lock and unlock the door? A servo? A general purpose lock that I modify? How?